90557665227 has 56 divisors (see below), whose sum is σ = 136717861280. Its totient is φ = 59953893120.

The previous prime is 90557665223. The next prime is 90557665267. The reversal of 90557665227 is 72256675509.

90557665227 is a `hidden beast` number, since 9 + 0 + 5 + 57 + 66 + 522 + 7 = 666.

It is not a de Polignac number, because 90557665227 - 2² = 90557665223 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90557665223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 124563138 + ... + 124563864.

It is an arithmetic number, because the mean of its divisors is an integer number (2441390380).

Almost surely, 2^90557665227 is an apocalyptic number.

90557665227 is a deficient number, since it is larger than the sum of its proper divisors (46160196053).

90557665227 is an equidigital number, since it uses as much as digits as its factorization.

90557665227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1695 (or 1680 counting only the distinct ones).

The product of its (nonzero) digits is 7938000, while the sum is 54.

The spelling of 90557665227 in words is "ninety billion, five hundred fifty-seven million, six hundred sixty-five thousand, two hundred twenty-seven".